摘要
建立了改进的QuEChERS-气相色谱测定食用植物油中12种有机磷农药的分析方法。样品经正己烷-乙腈(体积比1∶3)提取,10 mg PSA、10 mg GCB和100 mg无水硫酸镁净化后,采用气相色谱检测。结果表明,12种有机磷农药在0. 02~0. 5 mg/L范围内呈良好的线性关系,相关系数均大于0. 99,方法的检出限为0. 001~0. 01 mg/kg。3种加标水平(0. 05、0. 10、0. 20 mg/kg)下,检测菜籽油和大豆油中的12种有机磷农药残留,其回收率范围为80. 2%~113. 5%,相对标准偏差为5. 7%~16. 4%。将该法与凝胶渗透色谱法(GPC)和液-液萃取法(LLE)进行比较,具有快速、简便、有效、可靠和安全等优点。
An improved method for simultaneous determination of twelve organophosphorus pesticides in edible vegetable oils by QuEChERS-gas chromatography was developed.The sample was extracted by n-hexane-acetonitrile(volume ratio 1∶3),purified by 10 mg PSA,10 mg GCB and 100 mg anhydrous magnesium sulfate,and detected by gas chromatography.The results showed that the twelve organophosphorus pesticides showed good linear relationship in the range of 0.02-0.5 mg/L with the correlation coefficient higher than 0.99.The limits of detection was 0.001-0.01 mg/kg.Twelve organophosphorus pesticides residues in rapeseed oil and soybean oil were tested at three levels of standard added(0.05,0.10,0.20 mg/kg),and the recoveries and relative standard deviation were 80.2%-113.5%and5.7%-16.4%,respectively.The method was compared with gel permeation chromatography(GPC)and liquid-liquid extraction(LLE),and the method had the advantages of fastness,simpleness,effective,reliability and safety.
作者
马双
程妮郦
莫敏
谭斯匀
谢娅芹
曹淑瑞
MA Shuang;CHENG Nili;MO Min;TAN Siyun;XIE Yaqin;CAO Shurui(Chongqing Chemical Industry Vocational College,Chongqing401228,China;The Inspection Technical Center of Chongqing Entry-Exit Inspection&Quarantine Bureau,Chongqing400020,China)
出处
《中国油脂》
CAS
CSCD
北大核心
2019年第9期86-90,94,共6页
China Oils and Fats
